He means, my lord, that we are too remiss,
Whilst Bolingbroke, through our
security,
Grows strong and great in substance and in power.

Shak.
[1913 Webster]

(c) Freedom from risk; safety.
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Give up yourself merely to chance and hazard,
From firm
security.

Shak.
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Some . . . alleged that we should have no
security for our trade.

Swift.
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2. That which secures or makes safe; protection; guard; defense. Specifically: (a) Something given, deposited, or pledged, to make certain the fulfillment of an obligation, the performance of a contract, the payment of a debt, or the like; surety; pledge.
[1913 Webster]

Those who lent him money lent it on no
security but his bare word.

Macaulay.
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(b) One who becomes surety for another, or engages himself for the performance of another's obligation.
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3. An evidence of debt or of property, as a bond, a certificate of stock, etc.; as, government
securities.
[1913 Webster]